Jewellery and horology

Convert all sizes of clock and watch keys, milimetres, European system, British system CLICK "MORE" TO READ THE ARTICLE

Conversions for ring and finger sizes; watch and clock keys; weights CLICK "MORE" TO READ THE ARTICLE

Measuring diamonds, gauges, computers, conversions, app. CLICK "MORE" TO READ THE ARTICLE

Ultrasonic cleaning machines, polishing gold and silver, removing scratches from glass and acrylics CLICK "MORE" TO READ THE ARTICLE

How to make a DIY kit for removing tarnish from silver. CLICK "MORE" TO READ THE ARTICLE

The many types of screw and screwdriver CLICK "MORE" TO READ THE ARTICLE

Examples (pictures) and uses of the many types of plier and cutter CLICK "MORE" TO READ THE ARTICLE